How Scott Westerfeld imagined Leviathan

Here's a brief excerpt of his bit on John Scalzi's blog:

Leviathan is often described as a steampunk series, and fair enough (walking tanks!). But it hews closer to alternate history than most steampunk, with the son of the Archduke Ferdinand a character, and the timeline for the early war matching our own history closely. But in a way, the most “alternate” thing about it for me was simply writing an illustrated novel.

For one thing, I had to become an art director. (To maintain creative control, I agreed to pay Keith with my own money rather than the publisher’s. This is not the usual way with an illustrated book.) This new role meant knowing all sorts of details that a prose novelist could ignore. Sure, before writing this series, I would often claim to have imagined every scene down to the last detail. But that was all lies! Turns out, I didn’t really know what kind of wallpaper was in this room, or what sort of boots that character had on at that moment.

Read the whole thing.